US6073873A - Coil forming apparatus and method - Google Patents

Coil forming apparatus and method Download PDF

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Publication number
US6073873A
US6073873A US08/970,901 US97090197A US6073873A US 6073873 A US6073873 A US 6073873A US 97090197 A US97090197 A US 97090197A US 6073873 A US6073873 A US 6073873A
Authority
US
United States
Prior art keywords
rings
coil
interceptor
coil plate
plate assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/970,901
Other languages
English (en)
Inventor
T. Michael Shore
Melicher Puchovsky
Raymond R. Starvaski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Industry Inc
Original Assignee
Morgan Construction Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morgan Construction Co filed Critical Morgan Construction Co
Assigned to MORGAN CONSTRUCTION COMPANY reassignment MORGAN CONSTRUCTION COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PUCHOVSKY, MELICHER, SHORE, T. MICHAEL, STARVASKI, RAYMOND R.
Priority to US08/970,901 priority Critical patent/US6073873A/en
Priority to CA002252486A priority patent/CA2252486C/en
Priority to TW087118282A priority patent/TW390826B/zh
Priority to AT98309111T priority patent/ATE219705T1/de
Priority to ES98309111T priority patent/ES2178811T3/es
Priority to EP98309111A priority patent/EP0916422B1/en
Priority to DE69806217T priority patent/DE69806217T2/de
Priority to AU92376/98A priority patent/AU711833B2/en
Priority to CZ983694A priority patent/CZ369498A3/cs
Priority to JP10323221A priority patent/JP3084525B2/ja
Priority to ARP980105768A priority patent/AR017616A1/es
Priority to KR1019980048706A priority patent/KR100308625B1/ko
Priority to RU98120458/02A priority patent/RU2160646C2/ru
Priority to BR9804992-5A priority patent/BR9804992A/pt
Priority to CNB981241956A priority patent/CN1145989C/zh
Priority to IDP981495A priority patent/ID21730A/id
Publication of US6073873A publication Critical patent/US6073873A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • B21C47/262—Treatment of a wire, while in the form of overlapping non-concentric rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
    • B21C47/245—Devices for the replacement of full reels by empty reels or vice versa, without considerable loss of time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B21C47/10—Winding-up or coiling by means of a moving guide
    • B21C47/14—Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum
    • B21C47/146—Controlling or influencing the laying pattern of the coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus

Definitions

  • This invention relates generally to rod rolling mills where hot rolled steel rod is formed into a continuous series of rings, and the rings are deposited in an overlapping pattern on a conveyor on which they are subjected to controlled cooling.
  • the invention is concerned in particular with an improvement in the reforming chambers employed to receive and gather the rings into coils as they free fall from the delivery ends of the cooling conveyors.
  • the rings free fall in a helical formation into a cylindrical enclosure.
  • the rings alight on a coil plate where they accumulate in coil form around a central guide.
  • the coil plate is lowered to compensate for the growing height of the coil.
  • the central guide includes an upper nose cone which is separable from and carried on an underlying mandrel.
  • a ring distributor rotates continuously around the nose cone to distribute the free falling rings in a controlled pattern designed to maximize coil density and to insure a subsequent smooth tangle-free payoff of the coiled rod.
  • interceptor elements When a full coil has been accumulated around the mandrel, interceptor elements are operatively positioned across the path of ring descent at a fixed level spaced above that of the maximum elevation of the coil plate. The operatively positioned interceptor elements engage and temporarily support the nose cone. Thereafter, as the initial rings of the next coil begin to accumulate on the interceptor elements, the mandrel is shifted from beneath the nose cone to accommodate removal of the just completed coil from the reforming chamber. An empty mandrel is located beneath the nose cone, and the coil plate is returned to its maximum elevation. The interceptor elements are then retracted, causing the rings accumulated thereon to drop abruptly onto the underlying coil plate.
  • a primary objective of the present invention is to achieve a smooth transfer of rings from their temporarily accumulated position on the interceptor elements to the coil plate, thereby avoiding the detrimental consequences of the abrupt drop experienced with conventional arrangements.
  • a companion objective of the present invention is to maintain a relatively constant free-fall distance of rings throughout the coil forming operation, thus preserving the controlled distribution produced by the ring distributor rotating continuously around the nose cone.
  • the ring interceptor elements no longer support the nose cone while the underlying mandrel is shifted to a coil discharge position. Instead, the nose cone is temporarily supported by other components, and the interceptor elements are adapted to be lowered gradually, thereby maintaining a relatively constant free fall distance for the rings. As the interceptor elements are lowered past the elevated coil plate, a beneficially smooth transfer of any temporarily accumulated rings is achieved from the interceptor elements onto the coil plate, which then continues to lower throughout the remainder of the coil forming operation.
  • FIG. 1 depicts a reforming chamber in accordance with the present invention
  • FIG. 2 is an enlarged view of the upper end of the reforming chamber shown in FIG. 1;
  • FIG. 3 is a view looking down on the coil plate and ring interceptors
  • FIGS. 4A-4F are diagrammatic illustrations of various stages during a coil forming operation in accordance with the present invention.
  • a reforming chamber in accordance with the present invention is shown at 10.
  • the reforming chamber is positioned to receive a helical formation of rod rings 12 free falling from the delivery end of a conveyor 14.
  • the reforming chamber includes a vertically disposed guide generally indicated at 16, a vertically adjustable coil plate assembly 18, and vertically adjustable interceptor elements 20.
  • the guide 16 is subdivided into an upper nose cone 22 positioned for encirclement by the helical formation of free falling rings 12, and one of two underlying mandrels 24a, 24b.
  • the mandrels are carried on a base 26 which is rotatable about an axis A disposed at a 45° angle with respect to the mandrel axes. Each mandrel is axially adjustable with respect to the base 26 by conventional means (not shown).
  • the nose cone 22 is supported on the mandrel 24a.
  • the coil plate assembly 18 includes an elevator 28 moveable vertically along guide posts 30 or the like.
  • the elevator is connected as at 32 to cables or chains 34 extending around sheaves or sprockets 36, one of which is driven by a motor 38.
  • the elevator 28 carries a pair of arms 40.
  • the arms 40 are pivotally adjustable about axes 42 by means of linear actuators 44.
  • the arms 40 are provided with raised pedestals 46 spaced one from the other to define gaps 48 therebetween.
  • the linear actuators 44 operate to pivotally manipulate the arms 40 between closed positions as shown by the solid lines, and open positions as indicated at 40' by the broken lines.
  • the interceptor elements 20 are generally paddle-shaped, and as can best be seen in FIG. 2, are carried on heads 50 which are threaded internally for engagement with vertical screws 52.
  • Each head 50 has an external ring gear 54 meshed with a splined shaft 56 extending in parallel relationship to the adjacent screw 52.
  • a second gear 58 is also meshed with splined shaft 56, and is driven by a motor 60.
  • Each screw 52 is each driven by an individual dedicated actuator 62.
  • the actuators 62 are mechanically interconnected by shafts 64 and right angle gear boxes 66 and are powered by a common drive motor 68.
  • the drive motor 68 operates to rotate the screws 52 in unison to thereby vertically adjust the interceptor elements 20 between raised positions as shown by the solid lines in FIG. 2, and lowered positions as indicated by the broken lines at 20' in the same view. When in their lowered positions, the interceptor elements 20 are below the top surfaces of the pedestals 46 when the elevator assembly 18 is in its uppermost position.
  • the motors 60 are operable to rotate the splined shafts 56 in unison, thereby rotatably adjusting the interceptor elements 20 between operative positions as shown by the solid lines in FIG. 3, and inoperative positions shown at 20" by the broken lines in the same view.
  • the interceptor elements 20 When operatively positioned, the interceptor elements 20 are aligned vertically with the gaps 48 between the pedestals 46, and when inoperatively positioned, the interceptor elements are outboard of the arms 40 carrying the pedestals.
  • Support members 70 are arranged around the nose cone 22, and are pivotally adjustable by means of linear actuators 72 between retracted positions as shown by the solid lines in FIG. 2, and operative positions as indicated at 70' by the broken lines in the same view.
  • the ring distributor includes a rotating curved guide plate 76 which serves to deflect and horizontally distribute the rings 12 as they fall from the delivery end of the conveyor 14.
  • FIGS. 4A-4F The operation of a reforming chamber in accordance with the present invention will now be described with further reference to FIGS. 4A-4F.
  • the mandrel 24a has been axially elevated to support the nose cone 22, thereby allowing the support members 70 to be retracted to their inoperative positions. Rings 12 have begun to accumulate temporarily on the interceptor elements 20.
  • the drive motor 68 has been energized to begin lowering the interceptor elements 20 at a rate calculated to maintain the top of the temporarily accumulating rings at a level "L", which is the level at which ring free fall is interrupted.
  • the coil plate assembly 18 has been returned to its fully elevated position.
  • the rotating guide plate 76 of the ring distributor 74 operates to distribute the rings into the desired pattern as their free fall is arrested at level L.
  • the intercepting elements 20 have been lowered into the gaps 48 between the pedestals 46 of the coil plate assembly 18, thereby smoothly transferring the accumulation of rings from the interceptor elements onto the pedestals without any abrupt drop.
  • Motor 38 has been energized to begin lowering the coil plate assembly, the net result being that as coil formation continues, the interruption of ring free fall continues to take place at level L.
  • the motors 58 are energized to rotate the interceptor elements 20 to their open positions 20" (see FIG. 3). Thereafter, as depicted in FIG. 4C, the interceptor elements are returned to their fully elevated positions as the coil plate assembly continues to be lowered to accommodate the growing coil while maintaining ring free fall interruption at level L.
  • the mandrel 24a is axially lowered away from the nose cone 22, and the arms 40 of the coil plate assembly are opened to the positions indicated at 40' in FIG. 3. While this is taking place, rings are beginning to accumulate again on the operatively positioned interceptor elements 20, and these are again being lowered gradually to maintain ring free fall interruption at level L.
  • the mandrel base 26 has been rotated about axis A to position mandrel 24a horizontally in order to accommodate removal of the completed coil C.
  • Mandrel 24b is now aligned beneath the nose cone 22.
  • the coil plate assembly 18 has been returned to its fully elevated position, and the arms 40 have been closed about the mandrel 24b.
  • the mandrel 24b is then axially raised to the position previously occupied by mandrel 24a, as shown in FIG. 4A, and the support members 20 are again pivotally retracted.
  • Another coil forming cycle then continues as the completed coil C is cleared from mandrel 24a.
  • the present invention offers significant advantages over conventional coil forming methods and apparatus.
  • the interruption of ring free fall at a substantially constant level L. This is made possible by the controlled gradual lowering of the accumulating rings, initially while supported on the ring interceptor elements 20 and then while supported on the coil plate assembly 18.
  • the effectiveness of the ring distributor 74 is maximized because the rotating guide plate 76 contacts and locates the descending rings as they arrive on the top of the accumulating coil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
US08/970,901 1997-11-14 1997-11-14 Coil forming apparatus and method Expired - Fee Related US6073873A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US08/970,901 US6073873A (en) 1997-11-14 1997-11-14 Coil forming apparatus and method
CA002252486A CA2252486C (en) 1997-11-14 1998-11-02 Coil forming apparatus and method
TW087118282A TW390826B (en) 1997-11-14 1998-11-03 Coil forming apparatus and method
AT98309111T ATE219705T1 (de) 1997-11-14 1998-11-06 Verfahren und vorrichtung zum formen von windungen
ES98309111T ES2178811T3 (es) 1997-11-14 1998-11-06 Aparato y procedimiento para formacion de enrollamientos.
EP98309111A EP0916422B1 (en) 1997-11-14 1998-11-06 Coil forming apparatus and method
DE69806217T DE69806217T2 (de) 1997-11-14 1998-11-06 Verfahren und Vorrichtung zum Formen von Windungen
CZ983694A CZ369498A3 (cs) 1997-11-14 1998-11-13 Zařízení a způsob pro vytváření cívkového uspořádání kroužků
AU92376/98A AU711833B2 (en) 1997-11-14 1998-11-13 Coil forming apparatus and method
JP10323221A JP3084525B2 (ja) 1997-11-14 1998-11-13 コイルを形成する装置および方法
ARP980105768A AR017616A1 (es) 1997-11-14 1998-11-13 Un aparato para recibir formaciones continuas, en caliente, de anillos de varillas helicoidales para formar una bobina cilindrica derecha, y un metodo para formar a partir de dichas formaciones continuas, en caliente, de anillos dicha bobina mediante el empleo de dicho aparato
KR1019980048706A KR100308625B1 (ko) 1997-11-14 1998-11-13 코일성형장치및방법
RU98120458/02A RU2160646C2 (ru) 1997-11-14 1998-11-13 Устройство для приема винтового элемента из колец и способ приема винтового элемента из колец
BR9804992-5A BR9804992A (pt) 1997-11-14 1998-11-13 Aparelho e método de formação de enrolamento
CNB981241956A CN1145989C (zh) 1997-11-14 1998-11-13 线圈成形设备和方法
IDP981495A ID21730A (id) 1997-11-14 1998-11-16 Peralatan dan metode pembentukan koil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/970,901 US6073873A (en) 1997-11-14 1997-11-14 Coil forming apparatus and method

Publications (1)

Publication Number Publication Date
US6073873A true US6073873A (en) 2000-06-13

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ID=25517682

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/970,901 Expired - Fee Related US6073873A (en) 1997-11-14 1997-11-14 Coil forming apparatus and method

Country Status (16)

Country Link
US (1) US6073873A (zh)
EP (1) EP0916422B1 (zh)
JP (1) JP3084525B2 (zh)
KR (1) KR100308625B1 (zh)
CN (1) CN1145989C (zh)
AR (1) AR017616A1 (zh)
AT (1) ATE219705T1 (zh)
AU (1) AU711833B2 (zh)
BR (1) BR9804992A (zh)
CA (1) CA2252486C (zh)
CZ (1) CZ369498A3 (zh)
DE (1) DE69806217T2 (zh)
ES (1) ES2178811T3 (zh)
ID (1) ID21730A (zh)
RU (1) RU2160646C2 (zh)
TW (1) TW390826B (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6158683A (en) * 1998-03-18 2000-12-12 Sms Schloemann-Siemag Ag Apparatus for forming rolled wire-rod coil
US6405958B1 (en) * 1998-08-08 2002-06-18 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for minimizing the coil height of wire in a coil forming chamber
US20140145019A1 (en) * 2012-11-29 2014-05-29 Siemens Vai Metals Technologies Gmbh Coil forming apparatus and method
US20150129080A1 (en) * 2012-05-04 2015-05-14 Siemens Vai Metals Technologies Gmbh Reform Tub Iris to also include Coil Shear
CN104759473A (zh) * 2014-01-07 2015-07-08 安阳合力创科冶金新技术研发股份有限公司 交互式线材布料器
CN107321806A (zh) * 2017-07-24 2017-11-07 刘易铭 一种层叠式连续挤压金属管蚊香盘管生产线及生产方法
US20220219215A1 (en) * 2021-01-11 2022-07-14 Primetals Technologies USA LLC Automated rod coil cutting station

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109332501B (zh) * 2018-09-26 2020-01-21 山东环邦电子科技有限公司 电感元件压铆装置和电感元件自动组装设备

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US35440A (en) * 1862-06-03 Improvement in heaters
US2779551A (en) * 1953-12-30 1957-01-29 United States Steel Corp Crib for wire coil formed on stationary coiling block
US3088690A (en) * 1959-06-02 1963-05-07 Delore Sa Geoffroy Wire coiling apparatus
US3618871A (en) * 1969-08-01 1971-11-09 Morgan Construction Co Rod-intercepting means in a coil-forming chamber
US3646655A (en) * 1969-08-06 1972-03-07 Schloemann Ag Device for collecting turns of rod or wire
US4357965A (en) * 1979-04-13 1982-11-09 Nippon Steel Corporation Method and apparatus for gathering a ring shaped wire rod
US4437620A (en) * 1981-04-13 1984-03-20 Nippon Steel Corporation Method and apparatus for gathering rings or wire rods into coils
JPH05287638A (ja) * 1992-04-07 1993-11-02 Toray Ind Inc 異色シート
US5501410A (en) * 1995-01-27 1996-03-26 Morgan Construction Company Coil reforming chamber with auxiliary coil plate
US5735477A (en) * 1997-01-22 1998-04-07 Morgan Construction Company Stem coil pallet for making half weight coils

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648736A (en) * 1970-07-09 1972-03-14 Morgan Construction Co Coil forming and transfer device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US35440A (en) * 1862-06-03 Improvement in heaters
US2779551A (en) * 1953-12-30 1957-01-29 United States Steel Corp Crib for wire coil formed on stationary coiling block
US3088690A (en) * 1959-06-02 1963-05-07 Delore Sa Geoffroy Wire coiling apparatus
US3618871A (en) * 1969-08-01 1971-11-09 Morgan Construction Co Rod-intercepting means in a coil-forming chamber
US3646655A (en) * 1969-08-06 1972-03-07 Schloemann Ag Device for collecting turns of rod or wire
US4357965A (en) * 1979-04-13 1982-11-09 Nippon Steel Corporation Method and apparatus for gathering a ring shaped wire rod
US4437620A (en) * 1981-04-13 1984-03-20 Nippon Steel Corporation Method and apparatus for gathering rings or wire rods into coils
JPH05287638A (ja) * 1992-04-07 1993-11-02 Toray Ind Inc 異色シート
US5501410A (en) * 1995-01-27 1996-03-26 Morgan Construction Company Coil reforming chamber with auxiliary coil plate
US5735477A (en) * 1997-01-22 1998-04-07 Morgan Construction Company Stem coil pallet for making half weight coils

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6158683A (en) * 1998-03-18 2000-12-12 Sms Schloemann-Siemag Ag Apparatus for forming rolled wire-rod coil
US6405958B1 (en) * 1998-08-08 2002-06-18 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for minimizing the coil height of wire in a coil forming chamber
US20150129080A1 (en) * 2012-05-04 2015-05-14 Siemens Vai Metals Technologies Gmbh Reform Tub Iris to also include Coil Shear
US10166586B2 (en) * 2012-05-04 2019-01-01 Primetals Technologies USA LLC Reform tub iris to also include coil shear
US9162269B2 (en) * 2012-11-29 2015-10-20 Primetals Technologies USA LLC Coil forming apparatus and method
WO2014085084A1 (en) 2012-11-29 2014-06-05 Siemens Industry, Inc. Coil forming apparatus and method
CN104812506B (zh) * 2012-11-29 2017-03-08 西门子工业公司 线圈形成装置以及方法
RU2635593C2 (ru) * 2012-11-29 2017-11-14 ПРАЙМЕТАЛЗ ТЕКНОЛОДЖИЗ ЮЭсЭй ЭлЭлСи Устройство и способ для формирования катушки
TWI624420B (zh) * 2012-11-29 2018-05-21 美商美國冶金技術有限責任公司 線圈形成設備及方法
US20140145019A1 (en) * 2012-11-29 2014-05-29 Siemens Vai Metals Technologies Gmbh Coil forming apparatus and method
CN104759473A (zh) * 2014-01-07 2015-07-08 安阳合力创科冶金新技术研发股份有限公司 交互式线材布料器
CN107321806A (zh) * 2017-07-24 2017-11-07 刘易铭 一种层叠式连续挤压金属管蚊香盘管生产线及生产方法
US20220219215A1 (en) * 2021-01-11 2022-07-14 Primetals Technologies USA LLC Automated rod coil cutting station

Also Published As

Publication number Publication date
JP3084525B2 (ja) 2000-09-04
CA2252486C (en) 2002-01-01
BR9804992A (pt) 1999-11-16
EP0916422A2 (en) 1999-05-19
EP0916422B1 (en) 2002-06-26
AU711833B2 (en) 1999-10-21
AU9237698A (en) 1999-06-03
EP0916422A3 (en) 2000-01-12
ATE219705T1 (de) 2002-07-15
CA2252486A1 (en) 1999-05-14
JPH11216514A (ja) 1999-08-10
DE69806217T2 (de) 2003-02-13
KR100308625B1 (ko) 2001-10-19
TW390826B (en) 2000-05-21
ES2178811T3 (es) 2003-01-01
CN1221962A (zh) 1999-07-07
AR017616A1 (es) 2001-09-12
DE69806217D1 (de) 2002-08-01
KR19990045277A (ko) 1999-06-25
CN1145989C (zh) 2004-04-14
RU2160646C2 (ru) 2000-12-20
CZ369498A3 (cs) 1999-09-15
ID21730A (id) 1999-07-15

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